Note 11 - Discontinued Operations - Restructuring Charges (Details) - Consolidation of Nelco Products, Inc. and Neltec, Inc. [Member] $ in Thousands	9 Months Ended
	Dec. 01, 2019 USD ($)
Accrued, Beginning Balance	$ 1,324
Current Period Charges	495
Cash Payments	(1,143)
Non-Cash Charges
Accrued, Ending Balance	676
Total Costs Accrued to Date	5,185
Total Expected Costs	5,500
Facility Lease Costs [Member]
Accrued, Beginning Balance	1,324
Current Period Charges	100
Cash Payments	(748)
Non-Cash Charges
Accrued, Ending Balance	676
Total Costs Accrued to Date	2,941
Total Expected Costs	2,941
Employee Severance [Member]
Accrued, Beginning Balance
Current Period Charges
Cash Payments
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	1,081
Total Expected Costs	1,081
Equipment Removal [Member]
Accrued, Beginning Balance
Current Period Charges	324
Cash Payments	(324)
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	324
Total Expected Costs	615
Other Restructuring [Member]
Accrued, Beginning Balance
Current Period Charges	71
Cash Payments	(71)
Non-Cash Charges
Accrued, Ending Balance
Total Costs Accrued to Date	839
Total Expected Costs	$ 863